bitmap 图像处理相关类，c# gdi+简单图像处理-bitmap image-handling classes, c# gdi+ simple image processing

用C#编写的图像截取程序，可以截取位图并另存为一张图-The image capture program written in C#, can intercept bitmap and save as a picture

彩色图像处理基础知识包括彩色位图的颜色的分解，RGB分别单色处理，和平均处理 -A color image processing based knowledge includes the decomposition of the color of the color bitmap RGB monochrome processing, respectively, and the average processing